1/**
2 * Copyright (c) 2006-2023 LOVE Development Team
3 *
4 * This software is provided 'as-is', without any express or implied
5 * warranty. In no event will the authors be held liable for any damages
6 * arising from the use of this software.
7 *
8 * Permission is granted to anyone to use this software for any purpose,
9 * including commercial applications, and to alter it and redistribute it
10 * freely, subject to the following restrictions:
11 *
12 * 1. The origin of this software must not be misrepresented; you must not
13 * claim that you wrote the original software. If you use this software
14 * in a product, an acknowledgment in the product documentation would be
15 * appreciated but is not required.
16 * 2. Altered source versions must be plainly marked as such, and must not be
17 * misrepresented as being the original software.
18 * 3. This notice may not be removed or altered from any source distribution.
19 **/
20
21#ifndef LOVE_MATH_H
22#define LOVE_MATH_H
23
24#include <climits> // for CHAR_BIT
25#include <cstdlib> // for rand() and RAND_MAX
26
27/* Definitions of useful mathematical constants
28 * M_E - e
29 * M_LOG2E - log2(e)
30 * M_LOG10E - log10(e)
31 * M_LN2 - ln(2)
32 * M_LN10 - ln(10)
33 * M_PI - pi
34 * M_PI_2 - pi/2
35 * M_PI_4 - pi/4
36 * M_1_PI - 1/pi
37 * M_2_PI - 2/pi
38 * M_2_SQRTPI - 2/sqrt(pi)
39 * M_SQRT2 - sqrt(2)
40 * M_SQRT1_2 - 1/sqrt(2)
41 */
42
43#define LOVE_M_E 2.71828182845904523536
44#define LOVE_M_LOG2E 1.44269504088896340736
45#define LOVE_M_LOG10E 0.434294481903251827651
46#define LOVE_M_LN2 0.693147180559945309417
47#define LOVE_M_LN10 2.30258509299404568402
48#define LOVE_M_PI 3.14159265358979323846
49#define LOVE_M_PI_2 1.57079632679489661923
50#define LOVE_M_PI_4 0.785398163397448309616
51#define LOVE_M_1_PI 0.318309886183790671538
52#define LOVE_M_2_PI 0.636619772367581343076
53#define LOVE_M_2_SQRTPI 1.12837916709551257390
54#define LOVE_M_SQRT2 1.41421356237309504880
55#define LOVE_M_SQRT1_2 0.707106781186547524401
56#define LOVE_M_TORAD (float)(LOVE_M_PI/180.0)
57#define LOVE_M_TODEG (float)(180.0/LOVE_M_PI)
58#define LOVE_TORAD(x) (float)(x*LOVE_M_TORAD)
59#define LOVE_TODEG(x) (float)(x*LOVE_M_TODEG)
60
61namespace love
62{
63
64struct Rect
65{
66 int x, y;
67 int w, h;
68
69 bool operator == (const Rect &rhs) const
70 {
71 return x == rhs.x && y == rhs.y && w == rhs.w && h == rhs.h;
72 }
73};
74
75inline int nextP2(int x)
76{
77 x += (x == 0);
78 x--;
79 for (unsigned int i = 1; i < sizeof(int)*CHAR_BIT; i <<= 1) x |= x >> i;
80 return ++x;
81}
82
83inline float nextP2(float x)
84{
85 return (float) nextP2((int) x);
86}
87
88} // love
89
90#endif // LOVE_MATH_H
91